Answer:
If we have a function f(x) = y.
the set of possible values of x is called the domain
the set of possible values of y is called the range.
In this case, we have:
Blood alcohol content vs Reflex time,
The possible values of alcohol in blood content depend on the particular person, but we can have a minimum of 0.0 (no alcohol in blood) and a maximum of .51 (for a 90 lb person) because at this range the person enters the risk of death.
So the domain is: D = [0.0, 0.51]
But, we actually can have higher values of alcohol in blood, so we actually can use a domain:
D = [0.0, 1.0]
For the range, we need to see at the possible values of the reflex time.
And we know that the human reflex time is in between 100ms and 500ms
So our range can be:
R = [100ms, 500ms]
